The next figure shows an illustration of the idea behind this solution.

The radio coverage could be represented by a circle or disks (such as in legacy models) but also by a pattern like the one presented in the figure: beams or lobes. The advantage of such model is multiple: uses technological facts about the beamforming supported in the current (modern) access points, could be generalized to the previous more generic models…
The work concludes that the proposed new model of transmission processing is built on a new costing and opportunity evaluation model that leverages advances in antenna array processing such as beamforming techniques and Wlan integrated (with other technologies or protocols) design best practices. In addition to the transmission channels and corresponding transmission power levels, it considers the direction of transmission or beam as an additional degree of freedom of dynamic RRM purposes; A comparison to other models indicates that this work model is stable and performs better in very dense Wlan indoor and WLC-based network deployments.